Advanced Ads – Ad Manager & AdSense < 2.0.23 - Contributor+ Stored XSS via the_ad Shortcode 'ad_args' Parameter

The Advanced Ads WordPress plugin before 2.0.23 does not sanitize and escape a shortcode parameter before outputting it in the page, allowing users with the Contributor role and above to inject arbitrary web scripts that execute when the affected content is viewed, including by higher-privileged users.